Malicious PDF — malware analysis report

Static analysis result for SHA-256 afaccc6dd6306f26…

MALICIOUS

PDF

78.6 KB Created: 2021-04-13 04:54:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 415ef226e310f030eb3b9adcaf215fc2 SHA-1: 212425be8dcc63712d5c452783e3a4fb2effdef6 SHA-256: afaccc6dd6306f2664c3ac54c6ec4061178c8f1e6b6be73ce21cbab3e9bc7974
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by multiple heuristics, including ML and ClamAV, as malicious and a phishing attempt. The embedded URL and the high-risk heuristic 'PDF_SEO_UTM_REDIRECTOR_LINK' indicate a lure for free downloads or phishing. The document body, though heavily obfuscated, suggests a theme related to a driver's permit test, aligning with common phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://gimoguvi.ru/strik?utm_term=rmv+driver%2527s+permit+test PDF link annotation
    • http://antonioit.space/92967150759xsv7n.pdfIn PDF document text
    • http://sreview.online/me_myself_and_lies_videoskd30e.pdfIn PDF document text
    • https://cdn.sqhk.co/xovatagemi/j3gj4IT/email_notification_sounds_windows_10.pdfIn PDF document text
    • https://cdn.sqhk.co/zibavuna/KRYy0hg/wajibogam.pdfIn PDF document text
    • https://cdn.sqhk.co/viposaxa/i2TqKjj/tilozikokivibe.pdfIn PDF document text
    • https://cdn.sqhk.co/zifeduwa/fibyVja/16424313204.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/c6f236eb-5136-4658-816f-92ac409a4948/como_convertir_cm_a_pulgadas_formula.pdfIn PDF document text
    • https://s3.amazonaws.com/xelimewat/pibonufevivofavaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5391c4b4-77aa-4fcf-b9c1-19bfdf2ff9f3/dometic_rv_air_conditioner_filter_replacement.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/87719665238.pdfIn PDF document text
    • https://s3.amazonaws.com/miledu/debemezejunoxesun.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/11819089341.pdfIn PDF document text
    • https://s3.amazonaws.com/mulerux/xoserekelezumizotifof.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/mixipogagusul.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzufexarevima/kdigo_guidelines_hyperphosphatemia.pdfIn PDF document text
    • http://pesafitibum.epizy.com/film_jet_li_badges_of_fury.pdfIn PDF document text
    • http://kamaxunavag.epizy.com/wagojuxaxo.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/ejercicios_de_porcentajes_6o_primaria_para_imprimir.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/ipcc_special_report_september_2019.pdfIn PDF document text
    • http://vanidedafi.epizy.com/attendance_sheet_in_excel_format.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bab1165-4ddf-4fe6-9565-aa3f5914ed44/veras.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB44 4536 bytes
SHA-256: e094197919ef47cf345e24822539fc1043c73dcf5394dd9f5234a31eb7c06f2e
font_01_sfnt_off0000fabd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFABD 10720 bytes
SHA-256: d60dbfe14a9ab1e9fa866fd03edb9e47a31760914e40ad2440a1a3463fe30897
font_02_sfnt_off00011f4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F4C 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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